New maps, a host of new characters, new weapons and level design and objectives will make this worth a purchase for sure
If it is as you've said, just random maps from the prior games and nothing really new to speak of except characters...

No deal

You can actually walk and shoot in Mercenaries 3D ... at least walk and reload

I'd be lying if i said every part of my body would probably still buy this even if enhancements weren't made to the existing formula. But i really don't see Capcom taking a whole minigame and giving it a straight port across to a new handheld.

We can see there's existing characters and maps returning, fair enough. But let's see some past RE locations (maybe even Outbreak, just to tease The Crazies), iconic characters, a rewards (built-in achievements, if you wish) system and maybe even some kind of storymode. Nothing incredible, just a contained story, non-canon using the maps like Unreal Tournament 3 did.

HUNK ftw. maybe they will bring back Krauser or other characters.

Here are some things I want from this game.

Map Locations:

From RE1:
Forest Area
Mansion
Courtyard
Guest House
Lab

From RE2:
Police Station
Sewers
Lab

From RE3:
Streets of Racoon City

From RE0:
Train
RE0 Mansion

RE Code Veronica:
Arctic base

Plus all levels from RE4 and RE5

Characters:Rebecca,Billy,Enrinco,Chris,Jill,Barry, Nemisis, Brad (with running shoes and no guns), Luis Sera, Hunk, Wesker, Josheph Frost, Ada Wong, Jack Krauser, Edward Dewey, Fong Ling, Forests Spencer, Sheva, Steve, Josh, Alexia and Alfred, Mikhail, Nicholia, Carlos, Richard Aiken, James Marcus in leech form, Birkin in Tyrant form.

Controls:

I would like to be able to move and shoot at the same time although with the 3DS I'm not sure how it would work but in the trailer it looks like you can so I am hopefull.

I know they won't include all that but if even half of it was in there it would be amazing!

The 3d mercenaries would be cool because stuff will pop out of the screen.

Yesh I guess I want everything a little much I guess but a guy can dream!

I'd like to see some levels of past games, but I don't think we will get rewarded with that much new content. I'm guessing that Capcom feels it's easier (in reality it is) to recycle stale resources rather that create something new and fresh. But, I won't go into safe mode and be the cynic just yet, I'll give them the benefit of the doubt until we find out more.

I would love to see Brad Vickers. (with his running shoes).

There could be random turbo boost laying on the ground, that if you run over them Brad will speed up. The object of his game will be to remain hidden for as long as possible.

Epic Idea TheSeth!